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Technical Data Sheet
PartsTable / O-RING / 12346C18
12346C18 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. Key specifications include special_features: SET CONSISTS OF 5 EACH OF ABOVE DIMENSIONED RINGS, center_hole_diameter: 3.560 INCHES NOMINAL IN, cross-sectional_height: 0.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-363-8570, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
12346C18
NSN: 5331-01-363-8570
FSC: 5331 — O-RING
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
special_featuresSET CONSISTS OF 5 EACH OF ABOVE DIMENSIONED RINGS
center_hole_diameter3.560 INCHES NOMINAL IN
cross-sectional_height0.500 INCHES NOMINAL IN
NSN5331-01-363-8570
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12346C18 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.500 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.560 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.500 INCHES NOMINAL IN
SPECIAL FEATURESSET CONSISTS OF 5 EACH OF ABOVE DIMENSIONED RINGS
CENTER HOLE DIAMETER3.560 INCHES NOMINAL IN
END ITEM IDENTIFICATIONNIMITZ CLASS CVN; ARLEIGH BURKE CLASS DDG; WHIDBEY ISLAND CLASS LSD; SEAWOLF CLASS SSN; SUBMARINE AUXILLARY AND MISCELLANEOUS SYSTEMS; WASP CLASS LHD; MINE COUNTERMEASURES SUPPORT (MCS) CLASS (LPH-12); FORRESTAL CLASS CV; TRIDENT AUXILIARY SYSTEMS; SUBMARINE SHIP CONTROL AND NAVIGATION SYSTEMS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
C1065Interchangeable
interchangeable cross-reference
interchangeable
6811Interchangeable
interchangeable cross-reference
interchangeable
5467429Interchangeable
interchangeable cross-reference
interchangeable
D3UZ2128BInterchangeable
interchangeable cross-reference
interchangeable
202775-2Interchangeable
interchangeable cross-reference
interchangeable
C1065GInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12346C18?
12346C18 is a O-RING.
What parts can replace 12346C18?
There are 10 known substitutes for 12346C18: C1065, 6811, 5467429 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12346C18?
12346C18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-363-8570. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026